Nexperia

74HC74; 74HCT74

Dual D-type flip-flop with set and reset; positive edge-trigger

5.2. Pin description

Table 2. Pin description

Symbol

Pin

Description

1RD

1

asynchronous reset-direct input (active LOW)

1D

2

data input

1CP

3

clock input (LOW-to-HIGH, edge-triggered)

1SD

4

asynchronous set-direct input (active LOW)

1Q

5

output

1Q

6

complement output

GND

7

ground (0 V)

2Q

8

complement output

2Q

9

output

2SD

10

asynchronous set-direct input (active LOW)

2CP

11

clock input (LOW-to-HIGH, edge-triggered)

2D

12

data input

2RD

13

asynchronous reset-direct input (active LOW)

VCC

14

supply voltage

6. Functional description

Table 3. Function table

H = HIGH voltage level; L = LOW voltage level; X = don’t care.

Input

Output

nSD

nRD

nCP

nD

nQ

nQ

L

H

X

X

H

L

H

L

X

X

L

H

L

L

X

X

H

H

Table 4. Function table

H = HIGH voltage level; L = LOW voltage level; X = don’t care;

↑ = LOW-to-HIGH transition; Qn+1 = state after the next LOW-to-HIGH CP transition.

Input

Output

nSD

nRD

nCP

nD

nQn+1

nQ n+1

H

H

↑

L

L

H

H

H

↑

H

H

L

74HC_HCT74

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Product data sheet

Rev. 8 — 9 February 2023

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